broncobuddha said:
Jason,
I'm actually considering running stock E7s on my windsor until I save the coin for some good heads. How did it run? RPM band? Power?
Thanks.
I can only compare to the 302 that I was running before swapping, which had a cobra lower and comp cams box upper. The 302 had very little low end power, it was almost unbearable. At about 4500rpm it cam to life though. The 302 felt strong to a little over 6200, which was as high as I ever tried to run.
When the 351w went in with a lightning lower and the same comp cam upper, I regained all the bottom end, but didn't seem to gain much in the top end. The stock 351w bottom end (out of a 80's Bronco) seemed ok with revving over 6k, but I didn't do it too often as it was a j/y motor.
I never did get 1/4 mile times or dyno #'s.
A 351 with stock heads should have more torque and low end power than a 302. However stock heads and intake are somewhat restrictive in the top end, even for high revving 302s. Porting the stock heads will help, but I wouldn't spend the money on that for a 351w. Even ported stock heads will still be a restriction. Ported aftermarket heads should will work quite well though.
Keep an eye out for used heads. Sometimes fully ported/assy heads can be found for what new bare heads would cost.
Hope that anwers your question.
Good Luck